Describe three common problems that have often been faced by command economies. what kinds of issues have encouraged many countries to switch to mixed or market systems?

Common problems in a command economy include lack of the profit incentive, lack of competition and inefficiency. The profit motive lacks in a command economy hence there is no innovation. There is also inefficiency as the government determines what is produced as opposed to the market. May countries have switched to a mixed or market systems because the laws of demand and supply dictate what is produced leading to efficiency

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.

because the vietnam war was fought in an especially brutal and untraditional way